The stimulated Raman effect provides an efficient means for producing coherent optical signals throughout the visible and infrared portion of the spectrum using a single laser source as exciter and either a crystal or a cell containing a gas or liquid as the target. The Raman-shifted output retains the high-intensity well-collimated monochromatic properties of the original laser. The objectives of the research program presented in the report were to investigate those aspects of the Raman effect relevant to the possibility of constructing a tunable Raman laser in which continuous tuning over tens of angstroms could be expected.
This post was published on February 27, 2020 1:11 pm
In January 2025, President Donald J. Trump signed Executive Order 14176, titled "Declassification of Records…
Nearly five years ago, The Black Vault filed a Freedom of Information Act (FOIA) request…
A newly released set of U.S. Army intelligence records offers a rare glimpse into behind-the-scenes…
In 1999, the Department of Defense Polygraph Institute (DoDPI) released a bibliography of audiovisual training…
Background The assassination of John F. Kennedy, the 35th President of the United States, is…
A newly released batch of documents, obtained through the Freedom of Information Act (FOIA), reveals…